Mental Math
200-189
If y=3x+5, is (2,11) a solution?
YES! 11=11!
Is this a polynomial?
y=(x-2)(x+3)(x+4)
Yes, it is a polynomial of degree 3 with 3 different real roots.
Simplify
(2x2-3x-2)-(3x2+2x-1)=
-x2-5x-1
How many siblings does Ms. Melendez have?
4!
3 sisters, 1 brother
2(10)-5+7
22
What is the slope and y-intercept of y=-x ?
slope: -1
y-intercept: (0,0)
Is this a polynomial?
y=x4-x-3
No, there is a negative exponent
f(x)=3x-4
g(x)=-2x+11
When is f(x)-g(x)=0?
x=3
What is Ms. Melendez's favorite color?
Green
What is -52 ?
-25
solve for x:
-2(x+3)-5x+1=2
x=-1
What is the degree of the polynomial and how many real roots does the following polynomial have?
y=x2(x-3)(x+10)2
a polynomial of degree 5, but 3 real roots
|-10-30|
40
What is Ms. Melendez's dog's name?
Georgie
if f(x)=2x2-1, what is f(2)?
f(2)=7
Write a linear equation with slope 4 and y-intercept (0,-3)
y=4x-3
What are the x-intercepts of
y=x(x+4)(x-5)2
(0,0)
(-4,0)
(5,0)
Write a system of equations for the following scenario:
Antonio bought 3 chips and 4 sodas, spending a total of $12.50. Julia spent $11.50 on 5 chips and 2 sodas. How much did each bag of chips and soda cost?
3c+4s=12.50
5c+2s=11.50
Sweet or salty snacks?
SWEET
-3(1)2+10-5-11
Write a linear equation that goes through (2,3) and (-1,-3)
y=2x-1
What would the shape look like?
y=(x-1)16
looks like a quadratic because the exponent is even
Solve the system:
y=2x-1
3x+4y=18
(2,3)
What kind of show/movie genre does she like to watch?
Crime or documentaries